[arch-general] plasma 5 crashing

[Genes Lists]

Fully updated from testing repo.

Since update to plasma 5.5 I am getting periodic crashes of plasmashell 
-trace back below.  Seems to be connected with dri/swrast_dri.so.

i915 graphics so not sure why swrast_dri is called - but then again not 
sure what that does exactly (sounds like software rendering).

Anyone got suggestions or seen similar.

plasma restarts itself and things go normally for a while until the next 
crash.

gene


--- trace back

Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f7c26ff0800 (LWP 2502))]

...

Thread 1 (Thread 0x7f7c26ff0800 (LWP 2502)):
[KCrash Handler]
#5  0x00007f7c34c52b22 in __memmove_avx_unaligned () from /usr/lib/libc.so.6
#6  0x00007f7c1763dc8d in ?? () from /usr/lib/xorg/modules/dri/swrast_dri.so
#7  0x00007f7c1763c645 in ?? () from /usr/lib/xorg/modules/dri/swrast_dri.so
#8  0x00007f7c1db1e8fa in ?? () from 
/usr/lib/qt/qml/org/kde/plasma/core/libcorebindingsplugin.so
#9  0x00007f7c1db1f3f9 in ?? () from 
/usr/lib/qt/qml/org/kde/plasma/core/libcorebindingsplugin.so
#10 0x00007f7c1db1f954 in ?? () from 
/usr/lib/qt/qml/org/kde/plasma/core/libcorebindingsplugin.so
#11 0x00007f7c38652ac0 in 
QQuickWindowPrivate::updateDirtyNode(QQuickItem*) () from 
/usr/lib/libQt5Quick.so.5
#12 0x00007f7c3865331b in QQuickWindowPrivate::updateDirtyNodes() () 
from /usr/lib/libQt5Quick.so.5
#13 0x00007f7c38653490 in QQuickWindowPrivate::syncSceneGraph() () from 
/usr/lib/libQt5Quick.so.5
#14 0x00007f7c3862219c in ?? () from /usr/lib/libQt5Quick.so.5

...